数学思想的真正考验是它能否激发进一步的思考。
跨国合作是保护我们共同海洋遗产的关键。
Who hears music, feels his solitude peopled at once.
"The truth is rarely pure and never simple."
可持续发展已不再是选择，而是任何希望在未来蓬勃发展的企业的必需品。